Measurements and Error Analysis

Which of the following statements best defines measurement in science and engineering?

• Measurement is the process of assigning numbers to objects or events.

• Measurement is the process of counting objects or events.

• Measurement is the process of guessing the value of an object or event.

• Measurement is the process of estimating the weight of an object or event.

What is the SI unit for measuring length?

• Kilogram (kg)

• Second (s)

• Meter (m)

• Newton (N)

When measuring the length of an object using a ruler, which part of the ruler should you align with the object to ensure accuracy?

• The end of the ruler

• The middle of the ruler

• The beginning of the scale

• The zero mark on the ruler

What is the purpose of using significant figures in measurements?

• To confuse the reader

• To make the measurement seem more precise

• To convey the reliability of the measurement

• To increase the measured value

If you measure the length of an object as 3.25 meters, how many significant figures are in the measurement?

• 2

• 3

• 4

• 5

Which of the following best describes precision in measurements?

• Precision refers to how close a measured value is to the true value.

• Precision is a measure of how small the measurement is.

• Precision is related to the level of detail in the measurement.

• Precision is the degree of consistency or reproducibility in measurements.

When using a digital caliper to measure an object, what is the smallest division that you can accurately read?

• 0.1 millimeters

• 1 millimeter

• 0.01 millimeters

• 10 millimeters

If you measure a length as 12.7 cm, what is the length in millimeters?

• 0.127 mm

• 127 mm

• 1.27 mm

• 12,700 mm

Which of the following units is used to measure electrical resistance?

• Ohm (Ω)

• Ampere (A)

• Volt (V)

• Hertz (Hz)

What is the purpose of error analysis in measurements?

• To hide measurement mistakes

• To increase measurement precision

• To evaluate and understand the limitations of measurements

• To make measurements more accurate